[windup-dev] POST pipeline exploration

[Rebecca Searls]

No a pipeline is the top level grouping object.
For example an XML pipeline has all the xpath-value rules in it.
A JAVA pipleline has all the java-value rules in it. ... etc

----- Original Message -----
> From: "Robb Greathouse" <robb.greathouse at redhat.com>
> To: "Rebecca Searls" <rsearls at redhat.com>
> Cc: windup-dev at lists.jboss.org
> Sent: Wednesday, September 11, 2013 10:43:26 AM
> Subject: Re: POST pipeline exploration
> 
> Could the post pipelines be ordered first and then order the id's?
> 
> Robb Greathouse
> Partner Enablement
> Middleware Business Unit
> JBoss, a Division of Red Hat
> cellphone 505-507-4906
> 
> ----- Original Message -----
> > 
> > As a means of not polluting the existing framework too much but to add some
> > needed
> > flow of control functionality for post processing, I've been playing around
> > with
> > adding a new pipeline, POST.  The intent of pipeline POST is to provide a
> > place
> > to add a defined order of post processing of rules flagged during the
> > analysis
> > phase.  I've added attribute "id" to the xpath-value rule.  The 'id' is
> > ref-ed
> > by rules in POST.  Within POST "action" rules are provided with 0 or more
> > ids
> > to be associated with an action.  A list of actions are processed in the
> > order they
> > are defined.
> > 
> > The problem I am encountering with this design is that all POST pipeline
> > contents are
> > merged into a single POST pipeline class for the analysis phase.  This can
> > be
> > a problem if there is more than 1 POST pipeline acting upon the same ref
> > ID.
> > For example if switchyard and airport both altered some_common.xml file the
> > last one who touched it wins.  I don't see any easy way to instruct Windup
> > to only run switchyard if there are multiple POST pipelines present.
> > 
> > There is the same last-in problem if the action is associated directly with
> > the xpath-value rule
> > and there is some product specific information being placed in the file.
> > 
> > 
> > I suppose I could add a cmd-line option and require the user to point to
> > the
> > file containing the POST pipeline to run.
> > I really hate to require that of the user however.
> > 
> > I'm open to suggestions.
> > 
> > 
> > Here is a general idea of what the pipeline would look like.
> > 
> > <windup:pipeline type="POST"  id="My Switchyard Post Processor Pipeline">
> > 
> >     <windup:post-process
> >     class="org.jboss.post.process.switchyard.SwitchyardController">
> > 
> >         <windup:decorators>
> >             <windup:action
> >             class="org.jboss.post.process.switchyard.Service">
> >                 <property name="references">
> >                     <list>
> >                         <value>switchyard:Action:create service</value>
> >                         <value>switchyard:Action:set ref</value>
> >                     </list>
> >                 </property>
> >             </windup:action>
> > 
> >             <windup:action
> >             class="org.jboss.post.process.switchyard.Binding">
> >                 <property name="references">
> >                     <list>
> >                         <value>switchyard:Action:binding config
> >                         jms-bus</value>
> >                         <value>switchyard:Action:binding config
> >                         camel</value>
> >                     </list>
> >                 </property>
> >             </windup:action>
> > 
> >             <!--
> >             <windup:action
> >             class="org.jboss.post.process.common.ConfigUpdate">
> >                 <property name="references">
> >                     <list>
> >                         <value>Adjust:some_common.xml file</value>
> >                     </list>
> >                 </property>
> >             </windup:action>
> > 
> >         <windup:decorators>
> >     </windup:post-process>
> > 
> > </windup:pipeline>
> > 
> > 
>